Calvin's inlay work contains many different gem materials, this piece has Jet, Jasper, Spiny Oyster Shell, White Buffalo, Lapis Lazuli, Mother of Pearl , Coral and silver. The Bracelet measures just under 5 3/4" on the inside with a 1 5/16" gap My wrist is 7 1/2 total circumference; this piece fits me near perfect (see photo). 18 MM at the widest point of the center (just over 11/16) The silver at the bottom tapers down to approx. Stamped With Hallmark: "Calvin Begay" and "Sterling". Occasionally parts of Calvin's hallmark is not complete, this one is complete. Micro Inlay is excellent, however some stones will have matrix, small pits or other variations and parent rock visible. I have seen many online Calvin Begay listings claiming the black is jade or onyx, every piece we have bought from Calvin over the years the black material is Jet from near Acoma, New Mexico. This jet take an excellent polish and does resemble the harder materials, but under a microscope the jet shows grain and cell structure from its origins as wood turned by mother nature into jet, which is a harder close relative of Coal; it can be easily scratched or etched with a steel tool. Jet is used my many Native American artists. For size reference we usually include US.

Coins and currency A Silver Dollar is approx. 37.5 MM in diameter (Just under 1 ½) A penny is just under 19 MM approx. ¾ A Quarter is approx. 24 MM or 15/16 A half dollar is just over 30 MM or just under 1 ¼ A Nickel is approx.

The item "Sterling Silver Night Sky & Geo Designs micro Inlay Bracelet Navajo Calvin Begay" is in sale since Saturday, May 6, 2017. This item is in the category "Jewelry & Watches\Ethnic, Regional & Tribal\Native American\Bracelets". The seller is "sdavid_sterling" and is located in Tucson, Arizona. This item can be shipped worldwide.